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실수값 복원키를 이용한 광 영상 은닉 기술
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- Issue Date
- 2011-06
- Citation
- 대한임베디드공학회논문지, v.6, no.3, pp.168-173
- ISSN
- 1975-5066
- Publisher
- 대한임베디드공학회
- Language
- Korean
- Type
- Journal Article
- Abstract
- In this paper, an optical image hiding technique using real-valued decoding key is proposed. In the embedding process, a each zero-padded original image placed in a quadrants on an input plane is multiplied by a statistically independent random phase pattern and is Fourier transformed. An encoded image is obtained by taking the real-valued data from the Fourier transformed image. And then a phase-encoded pattern, used as a hidden image and a decoding key, is generated by the use of multiple phase wrapping from the encoded images. A transmitted image is made from the linear superposition of the weighted hidden images and a cover image. In reconstruction process, the mirror reconstructed images can be obtained at two quadrants by the inverse-Fourier transform of the product of the transmitted image and the decoding key. Computer simulation and optical experiment are demonstrated in order to confirm the proposed technique.